Siglent's SSA3021X Spectrum Analyzer covers signals in the 9 KHz - 2.1 GHz range and measures the magnitude of an input signal versus frequency over the complete frequency series of the instrument. It is ideal for determining the power of the spectrum of both known and unknown signals. Examining electrical signal spectra assists define cordless transmitters or other electronic devices, determining dominant frequency, power, distortion, harmonics, bandwidth, and other spectral parts of a signal that are not quickly identified in time domain display screens. The SSA3021X Spectrum Analyzer is lightweight (10lb) and little size (15.5" x 8.2" x 4.6"), with an easy to use interface on a large 10.1" TFT LCD. It features 256MB of internal storage memory, with as much as 32GB supported externally by means of the USB port.